3 years ago

Can you answer question B?

Mathematics

1 answer:

SVETLANKA909090 [29]3 years ago

8 0

Answer=9.7

Step-by-step explanation:

<h3>divide 19.4 by 2</h3>

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It is in all 0.0098934551 in all in total

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3 years ago

Jessica makes overtime pay when she works more than 40 hours in a week. So far this week she has worked 29 hours. She will conti

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Step-by-step explanation:

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3 years ago

Evaluate the expression. (26÷13)⋅(−7)+14−4

Bas_tet [7]

Follow pemdas. Evaluate operations in parentheses first.
2*(-7)+14-4

Then multiply
-14+14-4

Then add and subtract from left to right
-14+14=0
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Final answer: -4

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3 years ago

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Is -49 a rational number? please explain

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2 years ago

Solve for x : log(3x) + log(x + 4) = log(15).<br><br>Please explain it to me.

zlopas [31]

Answer:

x = 1

Explanation:

$\sf \rightarrow log(3x) + log(x + 4) = log(15)$

Rule: log(a) + log(b) = log(ab)

$\sf \rightarrow log(3x(x + 4)) = log(15)$

cancel out log on both sides

$\sf \rightarrow 3x(x + 4) = 15$

relocate constant variable

$\sf \rightarrow 3x^2 + 12x -15 = 0$

take 3 as a common factor

$\sf \rightarrow 3(x^2 + 4x -5) = 0$

divide both sides by 3

$\sf \rightarrow x^2 + 4x -5 = 0$

middle term split

$\sf \rightarrow x^2 + 5x -x-5 = 0$

factor common terms

$\sf \rightarrow x(x + 5) -1(x+5)= 0$

collect into groups

$\sf \rightarrow (x-1)(x+5)= 0$

set to zero

$\sf \rightarrow x-1 = 0 , \ x+5= 0$

relocate variables

$\sf \rightarrow x = 1, \ x = -5$

There must be a positive solution for log, so the solution is only x = 1

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2 years ago

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